diff --git a/package.json b/package.json
index 7a559dd..021d8c7 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "build"
   ],
   "engines": {
-    "node": ">= 14.18.0"
+    "node": ">= 16"
   },
   "scripts": {
     "test": "make clean && make && make pretest && make test",
@@ -23,6 +23,7 @@
     "preversion": "npm run build"
   },
   "devDependencies": {
+    "@tsconfig/node16-strictest": "^1.0.4",
     "@types/node": "^18.11.18",
     "@types/tar-fs": "^2.0.1",
     "clean-modules": "^2.0.6",
diff --git a/source/index.ts b/source/index.ts
index 3ad8b87..12aab1c 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -1,5 +1,5 @@
 import { access, createWriteStream, existsSync, mkdirSync, symlink } from 'node:fs';
-import { IncomingMessage } from 'node:http';
+import type { IncomingMessage } from 'node:http';
 import LambdaFS from './lambdafs';
 import { join } from 'node:path';
 import { URL } from 'node:url';
@@ -38,15 +38,15 @@ interface Viewport {
   hasTouch?: boolean;
 }
 
-if ( process.env.AWS_EXECUTION_ENV !== undefined && /^AWS_Lambda_nodejs(?:14|16|18)[.]x$/.test(process.env.AWS_EXECUTION_ENV) === true) {
-  if (process.env.FONTCONFIG_PATH === undefined) {
-    process.env.FONTCONFIG_PATH = '/tmp/aws';
+if ( process.env['AWS_EXECUTION_ENV'] !== undefined && /^AWS_Lambda_nodejs(?:14|16|18)[.]x$/.test(process.env['AWS_EXECUTION_ENV']) === true) {
+  if (process.env['FONTCONFIG_PATH'] === undefined) {
+    process.env['FONTCONFIG_PATH'] = '/tmp/aws';
   }
 
-  if (process.env.LD_LIBRARY_PATH === undefined) {
-    process.env.LD_LIBRARY_PATH = '/tmp/aws/lib';
-  } else if (process.env.LD_LIBRARY_PATH.startsWith('/tmp/aws/lib') !== true) {
-    process.env.LD_LIBRARY_PATH = [...new Set(['/tmp/aws/lib', ...process.env.LD_LIBRARY_PATH.split(':')])].join(':');
+  if (process.env['LD_LIBRARY_PATH'] === undefined) {
+    process.env['LD_LIBRARY_PATH'] = '/tmp/aws/lib';
+  } else if (process.env['LD_LIBRARY_PATH'].startsWith('/tmp/aws/lib') !== true) {
+    process.env['LD_LIBRARY_PATH'] = [...new Set(['/tmp/aws/lib', ...process.env['LD_LIBRARY_PATH'].split(':')])].join(':');
   }
 }
 
@@ -62,12 +62,12 @@ class Chromium {
       });
     }
 
-    if (process.env.HOME === undefined) {
-      process.env.HOME = '/tmp';
+    if (process.env['HOME'] === undefined) {
+      process.env['HOME'] = '/tmp';
     }
 
-    if (existsSync(`${process.env.HOME}/.fonts`) !== true) {
-      mkdirSync(`${process.env.HOME}/.fonts`);
+    if (existsSync(`${process.env['HOME']}/.fonts`) !== true) {
+      mkdirSync(`${process.env['HOME']}/.fonts`);
     }
 
     return new Promise((resolve, reject) => {
@@ -76,7 +76,7 @@ class Chromium {
       }
 
       const url = new URL(input);
-      const output = `${process.env.HOME}/.fonts/${url.pathname.split('/').pop()}`;
+      const output = `${process.env['HOME']}/.fonts/${url.pathname.split('/').pop()}`;
 
       if (existsSync(output) === true) {
         return resolve(output.split('/').pop() as string);
@@ -213,7 +213,7 @@ class Chromium {
       LambdaFS.inflate(`${input}/swiftshader.tar.br`),
     ];
 
-    if (process.env.AWS_EXECUTION_ENV !== undefined && /^AWS_Lambda_nodejs(?:14|16|18)[.]x$/.test(process.env.AWS_EXECUTION_ENV) === true) {
+    if (process.env['AWS_EXECUTION_ENV'] !== undefined && /^AWS_Lambda_nodejs(?:14|16|18)[.]x$/.test(process.env['AWS_EXECUTION_ENV']) === true) {
       promises.push(LambdaFS.inflate(`${input}/aws.tar.br`));
     }
 
@@ -227,10 +227,10 @@ class Chromium {
    * False is returned if Serverless environment variables `IS_LOCAL` or `IS_OFFLINE` are set.
    */
   static get headless() {
-    if (process.env.IS_LOCAL !== undefined || process.env.IS_OFFLINE !== undefined) {
+    if (process.env['IS_LOCAL'] !== undefined || process.env['IS_OFFLINE'] !== undefined) {
       return false;
     }
-    if (process.env.NODE_ENV === "test") {
+    if (process.env['NODE_ENV'] === "test") {
       return true;
     }
     const environments = [
diff --git a/tsconfig.json b/tsconfig.json
index 24d1ae7..bdf2ba4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,18 +1,9 @@
 {
+  "extends": "@tsconfig/node16-strictest/tsconfig.json",
   "compilerOptions": {
     "declaration": true,
-    "declarationDir": "build",
-    "esModuleInterop": true,
-    "forceConsistentCasingInFileNames": true,
-    "lib": ["dom", "es2020"],
-    "module": "commonjs",
-    "moduleResolution": "node",
-    "outDir": "build",
-    "pretty": true,
-    "skipLibCheck": true,
-    "strict": true,
-    "target": "es2020",
+    "lib": ["dom"],
+    "outDir": "build"
   },
-  "exclude": ["build", "node_modules", "tmp"],
   "include": ["source"]
 }